A \( 9 \times 10^{-9} \mathrm{Nm}^{2} \mathrm{C}^{-2} \)
B \( 10 \times 10^{9} \mathrm{Nm}^{2} \mathrm{C}^{-2} \)
C \( 9 \times 10^{9} \mathrm{Nm}^{2} \mathrm{C}^{-2} \)
D \( 8 \times 10^{9} \mathrm{Nm}^{2} \mathrm{C}^{-2} \)
Correct Answer: Option C
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